package util.translate;
import java.util.Random;


public class RandomString {
	
	public static String getRandomString(int length) {   
        Random random=new Random();   
        StringBuffer sb=new StringBuffer();   
        for(int i=0;i<length;i++){   
            int number=random.nextInt(3);   
            long result=0;   
            switch(number){   
                case 0:   
                    result = Math.round(Math.random()*25+65);   
                    sb.append(String.valueOf((char)result));   
                    break;   
                case 1:   
                    result = Math.round(Math.random()*25+97);   
                    sb.append(String.valueOf((char)result));   
                    break;   
                case 2:   
                    sb.append(String.valueOf(new Random().nextInt(10)));   
                    break;   
            }   
        }   
        return sb.toString();   
    }   

}
